Lingo建模语言与实例4

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目标与约束段
* o( G0 P: c9 N9 x/ f/ L# ?2 n集合段（SETS    ENDSETS）
$ `' c" C3 K0 |/ v! [0 \: K& T9 A1 Z2 {数据段（DATA   ENDDATA）
初始段（INIT  ENDINIT）
6 P1 R7 ~/ h. y（计算段 (CALC ENDCALC)）
! _# B2 B$ n( e1 ]8 c: j. ^# ?MODEL:
Title Location Problem;
sets:
    demand/1..6/:a,b,d;
) w4 z' h3 C9 }$ v" N  i  a    supply/1..2/:x,y,e;
/ A! h9 n/ C! _    link(demand,supply):c;
" ^( U! g0 a0 T+ lendsets
- r0 M8 O$ ]9 z( v+ E/ k' Q/ udata:
a=1.25,8.75,0.5,5.75,3,7.25;
) r, I' ]0 C! X8 h0 }b=1.25,0.75,4.75,5,6.5,7.75;
6 k0 g9 A0 `( v' ~d=3,5,4,7,6,11; e=20,20;
enddata
" Z7 `1 v1 C7 @, V/ K9 rinit:
x,y=5,1,2,7;
% u* z3 L2 `9 l" |endinit
3 e$ o2 C8 @* }. Fmin=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
@for(demand(i)sum(supply(j):c(i,j))=d(i););
5 ^2 [8 U6 Q. r  B7 v  b@for(supply(i)sum(demand(j):c(j,i))<=e(i););
END

longde

好
: V4 q+ g$ E- l